CVE-2005-2021: cPanel

Medium severity, CVSS 4.3. EPSS: 2.7% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in cPanel 9.1 and earlier allows remote attackers to inject arbitrary web script or HTML via the user parameter in the login page.

Affected products

• cPanel cPanel: version 5.0 only; version 5.3 only; version 6.0 only; version 6.2 only; version 6.4 only; version 6.4.1 only; …

Published 2005-06-20. Last modified 2026-06-16.